William w



i @with gratas ste-nt @Hirn WILLIAM vW. TRAPP, 0F IIARTFORD,` CONNECTICUT, ASSIGNOR T0 TOBIAS KOEN, OF SAME PLACE.

Letters Patent No. 73,269, dated January 14, 1868. y

IMPROVEMENT IN MACHINERY POR POLISHING f'Il'IREAl).f

T0 ALL WHOM IT MAY CONCERN: n

Be it known that I,^W1LLIAM W. TRAPP, of Hartford, in the State of Connecticut,have invented certain new and useful Improvements in Machinery for Polishing Threads; and I do hereby declare that the following is e. full, clear, and exact description thereof, reference being had tothe accompanying drawings, making partY of this specification, in whichf Figure 1 is a. front elevation, and

Figure2 a vertical section taken in the plane of the line A a of iig. 1.

The same letters indicate like parts in both the iigures. 1 4

My said invention relates to improvements in machinery forpolishing silk, worsted, and other threads, by the well-known rubbiugprocess.Y By means of the said improvement, I am enabled to equalize the pull on the threads during the polishing-operation, and thereby greatly reduce the tendency to break the threads.

In the accompanying drawings, a represents a suitable frame, and bv the driving-shaft, with pulleys for the bands c, that drive the two sets of twisting-iliexs, d, in the usual manner. On the shaft there are cranks e and f, near each end, from which connecting-rods, g g extend to two cross-heads z h, which slide in vertical ways, and which `are connected with and impart a vertical reciprocating motion to two sets or series of carriages, z' z', arranged on opposite sides; and as the two sets ot' cranks are on opposite sides, one series of carriages descends as the set on the other side ascends, and viceversa, thus balancing each other, as described inan application for Letters Patent heretofore iilcd by me. From -thc front face 'of each rubber-carriage, two rows of' rubbers, j, project as represented. These rubbers are cylindrical pins, (or they may be rollers,) that project from the face Vof each carriage. Each thread to be rubbed or polished passes from a spoolor bobbin, k, on the spindle of one of the lliers, ,'by which it is twisted; from this flier to and over a horizontal rod, 1, thence under another similar rod, m, up around or amongst the rubbers j of one row; that is, the thread passes on one side of one, then on the opposite side of the next, and so` on, or once around each, the object being to make each'perform the oilice of rubbing. Then the thread passes over a pulley, n, above, and down in like manner amongst the other set of rubbers on lthe same carriage, under the rod m, then upwards over a rod, o, through the singeing` apparatus, p, of the usual kind, thenceunder another rod,p, to a spool, q, on which it is wound up, the said spool being borne by springs r on to the periphery of a roller, s, by which the winding motion is imparted to the spool. The roller s is one of a series on a shaft, t, which receives motion from the driving-shaft by a band, u, and pulleys 'u and w. The threads are properly laid on the spools by guides a', that slide on rods p and y, and which receive a reciprocating motionlfrom a cam-groove on a. cylinder, e, the shaft of which i s driven by a band, a', from a pulley on one of the shafts, t. i

It will be seen from the drawings that the machine is double,` there heilig a series of spools, fliers, guiderods, lrubber-carriages, winding-spools, and reciprocating guides on each side of the main driving-shaft, so that when the rubber-carriages on one side descend, the series on the `other side ascends, and=vce ocrsa, thereby avoiding thejars which would result from the use of one series only.

From the foregoing it will be seen that in whatever direction the rubber-carriages maybe travelling, by reason of having two sets ofrubbcrs on each carriage, with cach thread passing amongst one set ot' rubbers in one direction, and amongst the other set in the opposite direction, the pull on anyone thread, due to the rubbing action, will be simultaneously in opposite directions, thereby materially reducing the tendency to break the threads. And it will be obvious that my said invention'is not limited to the special construction of the mechanism, but upon the mode of operation, which consists in so organizing the machine that any one thread in its travel, and where the rubbcrsact upon it, shall move in opposite directions. And it will also be seen that it is immaterial whether there be two sets of rubbers on cach carriage, or ono set of sufficient length, and so disposed that the two parts lof the thread travelling in opposite directions may be acted upon by different parts of the length ofthe one set ci' rubbers.

What I claim as my invention, and desire to secure by Letters Patent, is- The'guides around which the threads pass, arranged substantially as described, in combina-tion with the reciprocating rubbers, so that each thread in its travel shall present two parts moving in opposite directions to the action ofthe rubbers, substantially as and for thc purpose described.

. WM. W. TRAPP.

Witnesses:

THOMAS McMANUs, ELIsHA J oHNsoN. 

